<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Entry.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Feed_Writer_Extension_RendererAbstract
 */
require_once 'Zend/Feed/Writer/Extension/RendererAbstract.php';

/**
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Writer_Extension_Threading_Renderer_Entry extends Zend_Feed_Writer_Extension_RendererAbstract {
	
	/**
	 * Set to TRUE if a rendering method actually renders something. This
	 * is used to prevent premature appending of a XML namespace declaration
	 * until an element which requires it is actually appended.
	 *
	 * @var bool
	 */
	protected $_called = false;
	
	/**
	 * Render entry
	 *
	 * @return void
	 */
	public function render() {
		if (strtolower ( $this->getType () ) == 'rss') {
			return; // Atom 1.0 only
		}
		$this->_setCommentLink ( $this->_dom, $this->_base );
		$this->_setCommentFeedLinks ( $this->_dom, $this->_base );
		$this->_setCommentCount ( $this->_dom, $this->_base );
		if ($this->_called) {
			$this->_appendNamespaces ();
		}
	}
	
	/**
	 * Append entry namespaces
	 *
	 * @return void
	 */
	protected function _appendNamespaces() {
		$this->getRootElement ()->setAttribute ( 'xmlns:thr', 'http://purl.org/syndication/thread/1.0' );
	}
	
	/**
	 * Set comment link
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setCommentLink(DOMDocument $dom, DOMElement $root) {
		$link = $this->getDataContainer ()->getCommentLink ();
		if (! $link) {
			return;
		}
		$clink = $this->_dom->createElement ( 'link' );
		$clink->setAttribute ( 'rel', 'replies' );
		$clink->setAttribute ( 'type', 'text/html' );
		$clink->setAttribute ( 'href', $link );
		$count = $this->getDataContainer ()->getCommentCount ();
		if ($count !== null) {
			$clink->setAttribute ( 'thr:count', $count );
		}
		$root->appendChild ( $clink );
		$this->_called = true;
	}
	
	/**
	 * Set comment feed links
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setCommentFeedLinks(DOMDocument $dom, DOMElement $root) {
		$links = $this->getDataContainer ()->getCommentFeedLinks ();
		if (! $links || empty ( $links )) {
			return;
		}
		foreach ( $links as $link ) {
			$flink = $this->_dom->createElement ( 'link' );
			$flink->setAttribute ( 'rel', 'replies' );
			$flink->setAttribute ( 'type', 'application/' . $link ['type'] . '+xml' );
			$flink->setAttribute ( 'href', $link ['uri'] );
			$count = $this->getDataContainer ()->getCommentCount ();
			if ($count !== null) {
				$flink->setAttribute ( 'thr:count', $count );
			}
			$root->appendChild ( $flink );
			$this->_called = true;
		}
	}
	
	/**
	 * Set entry comment count
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setCommentCount(DOMDocument $dom, DOMElement $root) {
		$count = $this->getDataContainer ()->getCommentCount ();
		if ($count === null) {
			return;
		}
		$tcount = $this->_dom->createElement ( 'thr:total' );
		$tcount->nodeValue = $count;
		$root->appendChild ( $tcount );
		$this->_called = true;
	}
}
